https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Thu, 01 Oct 2026 01:50:47 +0000 https://vulnerability.circl.lu/vuln/cve-2022-49304 <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>drivers: tty: serial: Fix deadlock in sa1100_set_termios()</p> <p>There is a deadlock in sa1100_set_termios(), which is shown below:</p> <p>(Thread 1) | (Thread 2) | sa1100_enable_ms() sa1100_set_termios() | mod_timer() spin_lock_irqsave() //(1) | (wait a time) ... | sa1100_timeout() del_timer_sync() | spin_lock_irqsave() //(2) (wait timer to stop) | ...</p> <p>We hold sport-&gt;port.lock in position (1) of thread 1 and use del_timer_sync() to wait timer to stop, but timer handler also need sport-&gt;port.lock in position (2) of thread 2. As a result, sa1100_set_termios() will block forever.</p> <p>This patch moves del_timer_sync() before spin_lock_irqsave() in order to prevent the deadlock.</p> <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>drivers: tty: serial: Fix deadlock in sa1100_set_termios()</p> <p>There is a deadlock in sa1100_set_termios(), which is shown below:</p> <p>(Thread 1) | (Thread 2) | sa1100_enable_ms() sa1100_set_termios() | mod_timer() spin_lock_irqsave() //(1) | (wait a time) ... | sa1100_timeout() del_timer_sync() | spin_lock_irqsave() //(2) (wait timer to stop) | ...</p> <p>We hold sport-&gt;port.lock in position (1) of thread 1 and use del_timer_sync() to wait timer to stop, but timer handler also need sport-&gt;port.lock in position (2) of thread 2. As a result, sa1100_set_termios() will block forever.</p> <p>This patch moves del_timer_sync() before spin_lock_irqsave() in order to prevent the deadlock.</p> https://vulnerability.circl.lu/vuln/cve-2022-49304